Cotter-pin tool.



D. 01 G. KERSTEN.

GOTTER PIN TOOL. APPLICATION FILED JAN. 12. 1910.

Patented 11:11:21, 1911.

"JEN'A Q. G. KERQTEN, 0E DETROIT, MICHIGAN.

CUTTER-131362 TOOL.

Specification of Letters Patent. P tentgd Elias. 21, 15911.

Application filed January 12, 1910. Serial No. 537,594.

0 all whom it may concern:

Be it known that I, DENA O. C. Knnsrsx, citizen of the United totes, residing at Detroit, in the county of Wayne and State of Michigan, have invented ccrtainnew and useful improvements in Cotter Pin Tools, of which the following is a specification.

My invention relates to gripping or holdinn tools and the device is especially adapted to seize and hold a cotter pin to facilitate its introduction into the hole or seat in the bolt. pin or other piccclto which it corresponds.

The chief objects of the improvements which form. the subject matter of this application for patent arcz to provide a simple and convenient )lool for the purpose stated; to furnish a cotter pin gripping device that will hold the pin firmly in the desired position relatively to the holder and with the point of the pin projecting, thus enabling the operator to readily insert a pin of this type in localities that are inaccessible to the hand or ordinary pliers or tongs, the firm hold which all'orded upon the pin pr"-- venting the latter from being accidentally released or "forced from the gripping; jaws during the ciifort to insert the point of the pin in the eye or hole which it is designed to lit.

Another object is to facilitate the release of the tool from engagement with the pin when the latter has become properly seated. A further object of the invention is to -turni5h means torquickly and conveniently spreading the points of the split key or cotter pin so that it will he firmly fixed in its scat.

I accomplish the desired results by means of the tool illustrated in the accompanying drawing. which forms a part of this application, the details of construction being disclosed in the following views Figure 1 is a side elevation of my improved. cotter pin holder, with a cotter pin engaged by the gripping members; the remainingfigures are drawn to an enlarged scale; Fig. 2 is a view of the grippingend of the device with a cotter pin engaged thereby; Fig. 3 is a perspective view of the notched end of the sleeve which forms one oi? the gripping members; Fig. 4 is a detail of the finger plate; Fig. 5 is a fragmentary view showing the notched end of the stem;

Fig. 6 is a slightly modified form of the stem.

Referring to the details of the drawing, the numeral 10 indicates a cylindrical stem' or rod provided with a head 11, and having its opp osite'end provided with. a shoulder or lip 12, formed by a notch 13. Surrounding the said stem 10 and slidahly mounted thereon is a tube or sleeve 14, secured in position by a stop pin 15 which. extends transversely through both sleeve and stem.

The said pin 15 is fixed in the sleeve but passes loosely through a slot 16 in the stem 10, thus permitting a limited longitudinal movement of the sleeve upon the stem, but

preventing any relative rotary movement of 7( either member. The stem 10 projects beyond the sleeve l-l at the rear or hcadedcnd, and upon the exposed portion of said stem is loosely mounted a finger plate 17 having projecting ends 18, and a central aperture 19 for the stern upon which it slides.

A. coiled extension spring 20 embraces the stem, the ends of the spring abutting against the head 11 and fingerplate 17 respectively,

the pressure of the spring 20 tending to extend the sleeve toward the pointed end of the stem. The front end of said sleeve is furnished with three marginal notches 21, There are two of the notches 21,spaced a short distance apart. and the posit-ion of the third notch 22 is diametrically opposite the middle point hctween the first mentioned notches. The purpose of these notches is to receive a cotter pin 23. the ring 24 of the pin engaging the duplicate notches 21 in the manner shown in F;lf 'f 2 while the' body of the pin passes through the notch 13 in the stem 10, and is lodged in the single notch 22, the end of the pin projecting considerably beyond the sleeve 14. the cotter pin is thus engaged, the action of the spring 20 will be to force the notched end of the sleeve toward the point of the stem thus gripping the said pin 23 tightly between the bottoms of the notches 21, 22

and the lip 12, while the sides of the notches will prevent any lateral displacement.

In Fig. (3 l have shown a notch 26 in the stem for the stop 12, which may be substituted for the sldtflh'thus simplifying and chcapening the manufacture. In the hen 95 same figure the end of the stem is made the cotter pin "after to serve as a finger hold while carrying the pointed or beveled to form a wedge 27, which may be used to spread the points of it has been inserted in its seat.

To insert a cotter pin in the holder the operator compresses the spring so that the sleeve may be retracted and allow the notched end of the stem or rod to protrude sufliciently to permit thepin' to be placed in the notches in the osition shown in are drawing, and upon rel easingthe spring the pin will be firmly gripped as previously described. The purpose of the finger plateis to afiord a secure abutment for the fingers while the spring is being retracted and also point of the tool to the location of the bolt, or other )art containing a hole or seat for the' pin or the purpose of inserting the latter. After the body of the pin has been inserted in its seat, the spring is again compressed so as to loosen the grip of the clamping members upon the pin, and the tool may then be readily removed, leaving the pin in its proper position. To. spread the ends of the cotter pin the wedge shaped end 27 is inserted between the prongs of the pin I spread these prongs apart.

Having thus describedimy invention, what I claimas new, is

12 A toolfor holding a cotter pin, includa stem-having a notch adjacent to one end,- a sleeve slidable on said stem, and having marginal notches adapted to register with the. said notch inthe stem, a spring adapted to normally extend the-sleeve upon the said stem, means for manually retracting the sleeve, and means for limiting the relative movement of the stem and sleeve.

'2. A tool for holding a-cotter prisin a stem having a pointed provided with a notch adjacent to said end, a sleeve slidable on said stem and having marginal notches adapted 'to register with said notch in the stem, a spring adapted to extend the sleeve relatively to the stem and means for. limiting the movement of, the sleeve on the stem. In testimony whereof I aflix my signature .in the presence of two witnesses.

DENA O. G. KERSTEJ.

Witnesses MEYER A. PEREIRA, PAUL R. LANG.

pin comend and 

